On Wed, 28 Apr 2004, Christopher Faylor wrote:
> On Wed, Apr 28, 2004 at 12:41:51PM -0500, Brian Ford wrote:
> This patch would only affect non-main threads. It would not affect the
> main thread. Wouldn't you need to do the same thing for the main thread?
> I don't understand why it would be different.
Something already does. I didn't try and track down the what/why.
00401060 <_main>:
401060: 55 push %ebp
401061: b8 10 00 00 00 mov $0x10,%eax
401066: 89 e5 mov %esp,%ebp
401068: 83 ec 08 sub $0x8,%esp
40106b: 83 e4 f0 and $0xfffffff0,%esp <-- SEE
This problem doesn't happen for the main thread. I'll try to pin the who
down if you like.
> >2004-04-28 DJ Delorie <[EMAIL PROTECTED]>
> >
> > * init.cc (threadfunc_fe): Hack to make thread stacks always 16
> > byte aligned.
> >
> >Index: init.cc
> >===================================================================
> >RCS file: /cvs/src/src/winsup/cygwin/init.cc,v
> >retrieving revision 1.32
> >diff -u -p -r1.32 init.cc
> >--- init.cc 22 Mar 2004 18:30:38 -0000 1.32
> >+++ init.cc 28 Apr 2004 17:38:03 -0000
> >@@ -27,6 +27,8 @@ HANDLE sync_startup;
> > static void WINAPI
> > threadfunc_fe (VOID *arg)
> > {
> >+ (void)__builtin_return_address(1);
> >+ asm volatile ("andl $-16,%%esp" ::: "%esp");
> > _cygtls::call ((DWORD (*) (void *, void *)) (((char **)
> >_tlsbase)[OLDFUNC_OFFSET]), arg);
> > }
--
Brian Ford
Senior Realtime Software Engineer
VITAL - Visual Simulation Systems
FlightSafety International
the best safety device in any aircraft is a well-trained pilot...
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